[go: up one dir, main page]

US9088949B2 - Power saving method at an access point - Google Patents

Power saving method at an access point Download PDF

Info

Publication number
US9088949B2
US9088949B2 US13/377,567 US201013377567A US9088949B2 US 9088949 B2 US9088949 B2 US 9088949B2 US 201013377567 A US201013377567 A US 201013377567A US 9088949 B2 US9088949 B2 US 9088949B2
Authority
US
United States
Prior art keywords
wireless
time
period
access point
wireless interface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US13/377,567
Other versions
US20120093053A1 (en
Inventor
Koen Van Oost
Sylvain Dumet
Sabine Bulteel
Erik Horemans
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
InterDigital CE Patent Holdings SAS
Original Assignee
Thomson Licensing SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from EP09447032A external-priority patent/EP2282588A1/en
Application filed by Thomson Licensing SAS filed Critical Thomson Licensing SAS
Publication of US20120093053A1 publication Critical patent/US20120093053A1/en
Assigned to THOMSON LICENSING reassignment THOMSON LICENSING ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BULTEEL, SABINE, DUMET, SYLVAIN, HOREMANS, ERIK, VAN OOST, KOEN
Application granted granted Critical
Publication of US9088949B2 publication Critical patent/US9088949B2/en
Assigned to INTERDIGITAL CE PATENT HOLDINGS reassignment INTERDIGITAL CE PATENT HOLDINGS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: THOMSON LICENSING
Assigned to INTERDIGITAL CE PATENT HOLDINGS, SAS reassignment INTERDIGITAL CE PATENT HOLDINGS, SAS CORRECTIVE ASSIGNMENT TO CORRECT THE RECEIVING PARTY NAME FROM INTERDIGITAL CE PATENT HOLDINGS TO INTERDIGITAL CE PATENT HOLDINGS, SAS. PREVIOUSLY RECORDED AT REEL: 47332 FRAME: 511. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT. Assignors: THOMSON LICENSING
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems
    • H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • Y02B60/50—
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present invention relates generally to a power saving mechanism and in particular to a power saving mechanism in a wireless access point.
  • a centralized wireless network comprises a wireless access point and a plurality of wireless stations or client devices.
  • a centralized wireless network is for example defined in the IEEE 802.11 family of standards.
  • the access point is adapted to manage association of devices to the wireless network.
  • the normal operational state of a wireless access point is to be active, even if no client devices are associated.
  • the access point periodically sends beacon control packets to inform any station devices on the wireless network features. Being always active, the access point permits the station devices to associate.
  • the access point In a residential environment, the access point is generally idle for a main part of the day; no stations are associated, and no traffic other than beacon transmission occurs on the wireless network.
  • the access point consumes energy to manage a wireless network that is not used.
  • the present invention attempts to remedy at least some of the concerns connected with the wireless access point in the prior art, by providing a power saving mechanism in the access point.
  • the present invention concerns a method at a wireless access point comprising a wireless interface, no wireless station being associated to said wireless access point, the method comprising the steps of enabling the wireless interface during a first period of time, checking if a wireless station associates during that first period of time, if a wireless station has been associated, keeping the wireless interface enabled, if a wireless station is attempting to associate, enabling the wireless interface during an extending period of time and if no wireless station is associated or is trying to associate, disabling the wireless interface for a second period of time.
  • the method according to the embodiment permits to disable the wireless interface of the access point, and to reduce the power dissipation of the access point.
  • the wireless interface is regularly enabled during a first period of time.
  • the first period of time is relatively short to optimize power saving.
  • the duration is extensible if necessary. It is extended when an association is in process. This permits the access point to check that the association is successful or not. If successful the access point then enables the wireless interface. If not successful, the access point disables the wireless interface again.
  • the method comprises the steps of, at the end of the extended period of time, if the wireless station has associated during the extended period of time, keeping the wireless interface enabled, and if the wireless station has cancelled attempting association, disabling the wireless interface for a second period of time.
  • Another object of the invention is a wireless access point comprising a wireless interface, wireless Interface Enabling enabling means for enabling or disabling the wireless interface and power reduction means for enabling the wireless interface during a first period of time, checking if a wireless station associates during that first period of time, and, if a wireless station has been associated, keeping the wireless interface enabled, if a wireless station is attempting to associate, enabling the wireless interface during an extending period of time, and if no wireless station is associated or is trying to associate, disabling the wireless interface for a second period of time.
  • the wireless access point is compliant with the IEEE802.11 standards.
  • the wireless access point is a femtocell.
  • FIG. 1 is a block diagram of an object compliant with the embodiment
  • FIG. 2 is a flow chart of an algorithm compliant with the embodiment.
  • FIG. 3 is represents the power saving behavior of an access point compliant with the embodiment
  • the represented blocks are purely functional entities, which do not necessarily correspond to physically separate entities. Namely, they could be developed in the form of hardware or software, or be implemented in one or several integrated circuits.
  • the access point according to the embodiment is adapted to reduce its power consumption, based on optimizing the wireless interface use.
  • the access point according to the embodiment is illustrated in FIG. 1 . It comprises a wireless interface 11 compliant to the standard IEEE 802.11 access point wireless interface.
  • a wireless sensing module 14 that is adapted to check if a wireless station has associated with the access point. It also comprises a power reduction module 17 that is adapted to perform the power reduction algorithm according to the embodiment. It comprises a wireless interface enabling module 13 that is adapted to enable or disable the wireless interface in a manner as described hereinafter. According to the embodiment, the wireless interface is regularly enabled during a preconfigured period of time, with the flexibility to dynamically extend this time while association is detected.
  • the power reduction algorithm according to the embodiment is now defined. It is performed in the power reduction module. It requires four parameters stored in the memory 12 .
  • the parameters are:
  • the INTF ON time and INTF OFF time are independent on any other timing requirements of the access point. For example, they are independent on the beacon period. However the INTF ON time might be long enough to enable the access point to send a beacon and the enable the stations to send association requests.
  • the parameters are set in the device. Of course, they can be modified locally using the user interface 16 . They can also be modified using a remote management protocol such as defined in the TR69 standard, CPE WAN Management Protocol, version 1.1 of December 2007.
  • the power reduction algorithm illustrated in FIG. 2 is realized using these parameters.
  • the wireless interface enabling module 13 enables the wireless interface for a preconfigured period (INTF ON time).
  • the wireless interface When the wireless interface is enabled, the access point functions as specified in the IEEE 802.11 standards. According to the embodiment, during this period the wireless sensing module checks if there are stations that successfully associate with the access point. If necessary, it informs the power reduction module. The associated stations identifiers list is stored in the memory 12 .
  • the power reduction module decides whether it should disable the wireless interface or keep it active. This decision is based on two criteria. Either there is a station that has successfully associated with the access point or a station is still attempting to associate with the access point.
  • a station has successfully associated with the access point.
  • the wireless interface is enabled.
  • the power reduction module periodically reads the associated stations list stored in the memory.
  • the wireless interface is kept active until no stations are populated in that list, i.e. until no stations are associated with the access point.
  • the power reduction module detects that no stations are associated any more, it makes the wireless interface enabling module disable the wireless interface.
  • the power reduction module is notified of an event by the INTF association/connection event flag received from the wireless sensing module. It keeps the wireless interface enabled for a preconfigured period (INTF EXT time) until no association attempts are seen for at least one extension period.
  • the power reduction module After the power reduction module has determined that there are no associated stations or no stations that are trying to associate, it disables the wireless interface for a preconfigured period (INTF OFF time). After that period the wireless interface is again enabled as the power reduction algorithm restarts. It should be noted that, when disabled, the access point doesn't receive and transmit traffic.
  • FIG. 3 illustrates the power saving behavior.
  • the wireless interface toggles ON/OFF. If an association attempt is detected, the ON time is extended until either a successful association or until the station stops trying. When association is detected, the wireless interface is enabled until all stations disconnect.
  • the embodiment is based on a WLAN access point compliant to the IEEE802.11 standards family.
  • the invention applies to any access point device of a centralized wireless network.
  • it applies to a wireless network that has capabilities to deliver an “association/connection request” packet.
  • a femtocell is a cellular base station that enables cellular devices to access a mobile network.
  • the cellular devices are the wireless stations of the algorithm of the embodiment.
  • the association is the registration process in the femtocell.
  • the On time extension is based on a predefined event on the wireless network.
  • the access point detects such an event, it keeps the wireless interface enabled for a preconfigured period.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention concerns a method at a wireless access point comprising a wireless interface, the method comprising the steps of enabling the wireless interface during a first period of time, checking if a wireless station associates during that first period of time, if a wireless station has been associated, keeping the wireless interface enabled, while a wireless station is attempting to associate, enabling the wireless interface during an extending period of time and if no wireless station is associated or is trying to associate, disabling the wireless interface for a second period of time.

Description

This application claims the benefit, under 35 U.S.C. §365 of International Application PCT/EP2010/058013, filed Jun. 8, 2010, which was published in accordance with PCT Article 21(2) on Dec. 16, 2010 in English and which claims the benefit of European patent application No. 09447023.4, filed Jun. 11, 2009 and European patent application No. 09447032.5, filed Jul. 24, 2009.
FIELD OF THE INVENTION
The present invention relates generally to a power saving mechanism and in particular to a power saving mechanism in a wireless access point.
BACKGROUND OF THE INVENTION
This section is intended to introduce the reader to various aspects of art, which may be related to various aspects of the present invention that are described and/or claimed below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present invention. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art.
A centralized wireless network comprises a wireless access point and a plurality of wireless stations or client devices. Such a centralized wireless network is for example defined in the IEEE 802.11 family of standards. The access point is adapted to manage association of devices to the wireless network. The normal operational state of a wireless access point is to be active, even if no client devices are associated. The access point periodically sends beacon control packets to inform any station devices on the wireless network features. Being always active, the access point permits the station devices to associate. In a residential environment, the access point is generally idle for a main part of the day; no stations are associated, and no traffic other than beacon transmission occurs on the wireless network.
The access point consumes energy to manage a wireless network that is not used.
SUMMARY OF THE INVENTION
The present invention attempts to remedy at least some of the concerns connected with the wireless access point in the prior art, by providing a power saving mechanism in the access point.
The present invention concerns a method at a wireless access point comprising a wireless interface, no wireless station being associated to said wireless access point, the method comprising the steps of enabling the wireless interface during a first period of time, checking if a wireless station associates during that first period of time, if a wireless station has been associated, keeping the wireless interface enabled, if a wireless station is attempting to associate, enabling the wireless interface during an extending period of time and if no wireless station is associated or is trying to associate, disabling the wireless interface for a second period of time.
The method according to the embodiment permits to disable the wireless interface of the access point, and to reduce the power dissipation of the access point. The wireless interface is regularly enabled during a first period of time. The first period of time is relatively short to optimize power saving. The duration is extensible if necessary. It is extended when an association is in process. This permits the access point to check that the association is successful or not. If successful the access point then enables the wireless interface. If not successful, the access point disables the wireless interface again.
According to an embodiment, the method comprises the steps of, at the end of the extended period of time, if the wireless station has associated during the extended period of time, keeping the wireless interface enabled, and if the wireless station has cancelled attempting association, disabling the wireless interface for a second period of time.
Another object of the invention is a wireless access point comprising a wireless interface, wireless Interface Enabling enabling means for enabling or disabling the wireless interface and power reduction means for enabling the wireless interface during a first period of time, checking if a wireless station associates during that first period of time, and, if a wireless station has been associated, keeping the wireless interface enabled, if a wireless station is attempting to associate, enabling the wireless interface during an extending period of time, and if no wireless station is associated or is trying to associate, disabling the wireless interface for a second period of time.
According to an embodiment, the wireless access point is compliant with the IEEE802.11 standards.
According to an embodiment, the wireless access point is a femtocell.
Certain aspects commensurate in scope with the disclosed embodiments are set forth below. It should be understood that these aspects are presented merely to provide the reader with a brief summary of certain forms the invention might take and that these aspects are not intended to limit the scope of the invention. Indeed, the invention may encompass a variety of aspects that may not be set forth below.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood and illustrated by means of the following embodiment and execution examples, in no way limitative, with reference to the appended figures on which:
FIG. 1 is a block diagram of an object compliant with the embodiment;
FIG. 2 is a flow chart of an algorithm compliant with the embodiment; and
FIG. 3 is represents the power saving behavior of an access point compliant with the embodiment;
In FIG. 1, the represented blocks are purely functional entities, which do not necessarily correspond to physically separate entities. Namely, they could be developed in the form of hardware or software, or be implemented in one or several integrated circuits.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
It is to be understood that the figures and descriptions of the present invention have been simplified to illustrate elements that are relevant for a clear understanding of the present invention, while eliminating, for purposes of clarity, many other elements found in typical digital multimedia content delivery methods and systems. However, because such elements are well known in the art, a detailed discussion of such elements is not provided herein. The disclosure herein is directed to all such variations and modifications known to those skilled in the art.
The access point according to the embodiment is adapted to reduce its power consumption, based on optimizing the wireless interface use. The access point according to the embodiment is illustrated in FIG. 1. It comprises a wireless interface 11 compliant to the standard IEEE 802.11 access point wireless interface.
It comprises a wireless sensing module 14 that is adapted to check if a wireless station has associated with the access point. It also comprises a power reduction module 17 that is adapted to perform the power reduction algorithm according to the embodiment. It comprises a wireless interface enabling module 13 that is adapted to enable or disable the wireless interface in a manner as described hereinafter. According to the embodiment, the wireless interface is regularly enabled during a preconfigured period of time, with the flexibility to dynamically extend this time while association is detected.
The power reduction algorithm according to the embodiment is now defined. It is performed in the power reduction module. It requires four parameters stored in the memory 12.
The parameters are:
    • INTF ON time: the period of time that the access point needs to be enabled
    • INTF OFF time: the period of time that the access point can be disabled
    • INTF EXT time: the period with which the ON time needs to be extended
    • INTF Association/Connection event: a Boolean flag that signals the detection of STA/UE association/connection requests
The INTF ON time and INTF OFF time are independent on any other timing requirements of the access point. For example, they are independent on the beacon period. However the INTF ON time might be long enough to enable the access point to send a beacon and the enable the stations to send association requests.
The parameters are set in the device. Of course, they can be modified locally using the user interface 16. They can also be modified using a remote management protocol such as defined in the TR69 standard, CPE WAN Management Protocol, version 1.1 of December 2007.
The power reduction algorithm illustrated in FIG. 2 is realized using these parameters.
When the access point boots, the wireless interface enabling module 13 enables the wireless interface for a preconfigured period (INTF ON time). When the wireless interface is enabled, the access point functions as specified in the IEEE 802.11 standards. According to the embodiment, during this period the wireless sensing module checks if there are stations that successfully associate with the access point. If necessary, it informs the power reduction module. The associated stations identifiers list is stored in the memory 12.
When the deadline of the ON period is reached, the power reduction module decides whether it should disable the wireless interface or keep it active. This decision is based on two criteria. Either there is a station that has successfully associated with the access point or a station is still attempting to associate with the access point.
In the first case, a station has successfully associated with the access point. The wireless interface is enabled. The power reduction module periodically reads the associated stations list stored in the memory. The wireless interface is kept active until no stations are populated in that list, i.e. until no stations are associated with the access point. When the power reduction module detects that no stations are associated any more, it makes the wireless interface enabling module disable the wireless interface.
In the second case a station is still attempting to associate with the access point. The power reduction module is notified of an event by the INTF association/connection event flag received from the wireless sensing module. It keeps the wireless interface enabled for a preconfigured period (INTF EXT time) until no association attempts are seen for at least one extension period.
After the power reduction module has determined that there are no associated stations or no stations that are trying to associate, it disables the wireless interface for a preconfigured period (INTF OFF time). After that period the wireless interface is again enabled as the power reduction algorithm restarts. It should be noted that, when disabled, the access point doesn't receive and transmit traffic.
FIG. 3 illustrates the power saving behavior. When not used, the wireless interface toggles ON/OFF. If an association attempt is detected, the ON time is extended until either a successful association or until the station stops trying. When association is detected, the wireless interface is enabled until all stations disconnect.
The embodiment is based on a WLAN access point compliant to the IEEE802.11 standards family. Of course the invention applies to any access point device of a centralized wireless network. In particular, it applies to a wireless network that has capabilities to deliver an “association/connection request” packet.
In particular the invention applies to a femtocell, also called an access point base station or a Home Node B. A femtocell is a cellular base station that enables cellular devices to access a mobile network. The cellular devices (UE) are the wireless stations of the algorithm of the embodiment. The association is the registration process in the femtocell.
More generally, the On time extension is based on a predefined event on the wireless network. When the access point detects such an event, it keeps the wireless interface enabled for a preconfigured period.
References disclosed in the description, the claims and the drawings may be provided independently or in any appropriate combination. Features may, where appropriate, be implemented in hardware, software, or a combination of the two.
Reference herein to “one embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one implementation of the invention. The appearances of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments necessarily mutually exclusive of other embodiments.
Reference numerals appearing in the claims are by way of illustration only and shall have no limiting effect on the scope of the claims.

Claims (10)

The invention claimed is:
1. A method at a wireless access point comprising a wireless interface, said method comprising:
while no wireless station is associated to said wireless access point,
enabling the wireless interface during a first period of time;
if a wireless station has associated during said first period of time, keeping the wireless interface active;
if a wireless station is attempting to associate during said first period of time, enabling the wireless interface during an extended period of time; and
if no wireless station has associated or has attempted to associate during said first period of time, disabling the wireless interface for a second period of time so that when disabled the wireless interface does not transmit and receive, said second period of time being independent of any other timing requirements of the access point;
wherein, if said wireless station has associated during the extended period of time, keeping the wireless interface active at the end of said extended period of time, and if said wireless station has cancelled attempting association, disabling the wireless interface for said second period of time.
2. A method according to claim 1, said second period of time being independent of a beacon period.
3. A method according to claim 1, keeping the wireless interface active until no wireless station is associated to the access point.
4. A wireless access point comprising:
a wireless interface,
a wireless interface enabling module configured to enable or disable said wireless interface;
a power reduction module configured to enable the wireless interface during a first period of time, check if a wireless station associates during that first period of time, so that, if a wireless station has been associated during said first period of time, keeping the wireless interface active, if a wireless station is attempting to associate during said first period of time, enabling the wireless interface during an extended period of time, and if no wireless station has associated or has attempted to associate during said first period of time, disabling the wireless interface for a second period of time so that when disabled the wireless interface does not transmit and receive, said second period of time being independent of any other timing requirements of the access point, so that at the end of the second period of time the wireless interface is active during the first period of time, wherein said power reduction module is configured to, if said wireless station has associated during the extended period of time, keep the wireless interface active at the end of said extended period of time, and if said wireless station has cancelled attempting association, disable the wireless interface for said second period of time.
5. A wireless access point according to claim 4, said wireless access point being compliant with the IEEE802.11 standards.
6. A wireless access point according to claim 5, said second period of time being independent of a beacon period.
7. A wireless access point according to claim 4, said wireless access point being a femtocell.
8. A wireless access point according to claim 4, said power reduction module being configured to keep the wireless interface active until no wireless station is associated to the access point.
9. A method at a wireless access point device comprising a wireless interface, said wireless access point device being into a power reduction mode, said method comprising:
while no wireless station is associated to said wireless access point,
enabling the wireless interface during a first period of time;
if a wireless station has associated during said first period of time, keeping the wireless interface active and leaving the power reduction mode;
if a wireless station is attempting to associate during said first period of time, enabling the wireless interface during an extended period of time; and
if no wireless station has associated or has attempted to associate during said first period of time, disabling the wireless interface for a second period of time so that when disabled the wireless interface does not transmit and receive, said second period of time being independent of any other timing requirements of the access point
wherein, if said wireless station has associated during the extended period of time, keeping the wireless interface active at the end of said extended period of time, and if said wireless station has cancelled attempting association, disabling the wireless interface for said second period of time.
10. A method according to claim 9, on detection that no wireless stations are associated, entering the power reduction mode.
US13/377,567 2009-06-11 2010-06-08 Power saving method at an access point Active 2031-02-19 US9088949B2 (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
EP09447023.4 2009-06-11
EP09447023 2009-06-11
EP09447023 2009-06-11
EP09447032.5 2009-07-24
EP09447032A EP2282588A1 (en) 2009-07-24 2009-07-24 A power saving method at an access point
EP09447032 2009-07-24
PCT/EP2010/058013 WO2010142681A1 (en) 2009-06-11 2010-06-08 A power saving method at an access point

Publications (2)

Publication Number Publication Date
US20120093053A1 US20120093053A1 (en) 2012-04-19
US9088949B2 true US9088949B2 (en) 2015-07-21

Family

ID=42313537

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/377,567 Active 2031-02-19 US9088949B2 (en) 2009-06-11 2010-06-08 Power saving method at an access point

Country Status (10)

Country Link
US (1) US9088949B2 (en)
EP (1) EP2441297B1 (en)
JP (1) JP5506923B2 (en)
KR (1) KR101670534B1 (en)
CN (1) CN102804864B (en)
AU (1) AU2010257534B2 (en)
BR (1) BRPI1011686A2 (en)
ES (1) ES2715283T3 (en)
PL (1) PL2441297T3 (en)
WO (1) WO2010142681A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9930617B1 (en) 2017-03-17 2018-03-27 At&T Intellectual Property I, L.P. State change enabled by a hierarchical class of a radio access network device

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013038496A (en) * 2011-08-04 2013-02-21 Nippon Telegr & Teleph Corp <Ntt> Base station device and sleep control method
JP5518807B2 (en) * 2011-08-05 2014-06-11 日本電信電話株式会社 Base station apparatus and sleep control method
US9049658B2 (en) 2012-03-06 2015-06-02 Qualcomm Incorporated Power save mechanism for peer-to-peer communication networks
US8923180B2 (en) 2013-01-23 2014-12-30 Conversant Intellectual Property Management Incorporated Power saving in wireless network entities
US20150138991A1 (en) * 2013-11-19 2015-05-21 Qualcomm Incorporated Relay capable wireless apparatuses
CN103686963B (en) * 2013-12-06 2017-07-28 小米科技有限责任公司 Control wireless network method of switching, device, equipment and system
US20170071021A1 (en) * 2014-03-24 2017-03-09 Huawei Device Co., Ltd. Wireless communication method and wireless terminal
KR101485817B1 (en) * 2014-07-11 2015-01-26 가온미디어 주식회사 method of providing power management for access point, and computer-readable recording medium for the same
CN105684521B (en) * 2014-08-14 2019-10-18 华为技术有限公司 A kind of WIFI access point control method and WIFI access point

Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5566357A (en) 1994-10-06 1996-10-15 Qualcomm Incorporated Power reduction in a cellular radiotelephone
WO1997012475A1 (en) 1995-09-26 1997-04-03 Pacific Communication Sciences, Inc. Method and apparatus for low power mobile units for cellular communication system
US20030144020A1 (en) 2002-01-31 2003-07-31 Raghu Challa Intermediate wake mode to track sleep clock frequency in a wireless communication device
WO2004075583A1 (en) 2003-02-24 2004-09-02 Swisscom Ag Reduction of electrosmog in wireless local networks
WO2007013934A2 (en) 2005-07-20 2007-02-01 Interdigital Technology Corporation Method and system for reducing power consumption of a wireless transmit/receive unit
US20070082714A1 (en) 2005-10-07 2007-04-12 Robert Beach System and method for power conservation in a wireless device
US20070104454A1 (en) * 2005-01-31 2007-05-10 Kabushiki Kaisha Toshiba Video image encoder, video image decoder, and coded stream generation method
US20070127425A1 (en) 2005-08-15 2007-06-07 Ron Keidar Adaptive wake-up period of roaming wireless terminals
US20080063082A1 (en) * 2006-09-07 2008-03-13 Fujitsu Limited MPEG decoder and MPEG encoder
US20080089412A1 (en) * 2006-10-16 2008-04-17 Nokia Corporation System and method for using parallelly decodable slices for multi-view video coding
US20080129559A1 (en) * 2006-10-20 2008-06-05 Samsung Electronics Co.; Ltd H.264 decoder equipped with multiple operation units and method for decoding compressed image data thereof
US20080225950A1 (en) * 2007-03-13 2008-09-18 Sony Corporation Scalable architecture for video codecs
US20090034443A1 (en) 2007-07-30 2009-02-05 Jesse Walker Power saving idle mode algorithm for an access point
US20090034615A1 (en) 2007-07-31 2009-02-05 Kabushiki Kaisha Toshiba Decoding device and decoding method
EP2056628A1 (en) 2007-10-30 2009-05-06 Nokia Siemens Networks Oy Communication network element and method of switching activity states
WO2009077893A1 (en) 2007-12-17 2009-06-25 Nxp B.V. Method for generation of beacons by a base station in a wireless communications network
US20100002614A1 (en) * 2008-07-02 2010-01-07 Qualcomm Incorporated Low power modes for femto cells
US20100008277A1 (en) * 2008-07-11 2010-01-14 Milind Kopikare Partial power save mode for access points during device discovery
US20100124931A1 (en) * 2008-11-05 2010-05-20 Suat Eskicioglu Location-based, event triggered inter-radio access technology handovers from a cdma macrocell to a wcdma femtocell
US20110244792A1 (en) * 2008-12-15 2011-10-06 Gi Won Park Method for saving power of a femto base station using sleep period synchronization
US8233456B1 (en) * 2006-10-16 2012-07-31 Marvell International Ltd. Power save mechanisms for dynamic ad-hoc networks
US20140022973A1 (en) * 2008-07-11 2014-01-23 Marvell World Trade Ltd. Power save mode for access points

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4251010B2 (en) * 2003-05-08 2009-04-08 ソニー株式会社 Wireless communication system
WO2009077983A1 (en) * 2007-12-17 2009-06-25 Koninklijke Philips Electronics, N.V. Apparatus, systems and methods for ultrasound imaging

Patent Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5566357A (en) 1994-10-06 1996-10-15 Qualcomm Incorporated Power reduction in a cellular radiotelephone
WO1997012475A1 (en) 1995-09-26 1997-04-03 Pacific Communication Sciences, Inc. Method and apparatus for low power mobile units for cellular communication system
US20030144020A1 (en) 2002-01-31 2003-07-31 Raghu Challa Intermediate wake mode to track sleep clock frequency in a wireless communication device
WO2004075583A1 (en) 2003-02-24 2004-09-02 Swisscom Ag Reduction of electrosmog in wireless local networks
US20070104454A1 (en) * 2005-01-31 2007-05-10 Kabushiki Kaisha Toshiba Video image encoder, video image decoder, and coded stream generation method
WO2007013934A2 (en) 2005-07-20 2007-02-01 Interdigital Technology Corporation Method and system for reducing power consumption of a wireless transmit/receive unit
US20070127425A1 (en) 2005-08-15 2007-06-07 Ron Keidar Adaptive wake-up period of roaming wireless terminals
CN101305625A (en) 2005-10-07 2008-11-12 讯宝科技公司 System and method for power conservation in a wireless device
US20070082714A1 (en) 2005-10-07 2007-04-12 Robert Beach System and method for power conservation in a wireless device
US20080063082A1 (en) * 2006-09-07 2008-03-13 Fujitsu Limited MPEG decoder and MPEG encoder
US20080089412A1 (en) * 2006-10-16 2008-04-17 Nokia Corporation System and method for using parallelly decodable slices for multi-view video coding
US8233456B1 (en) * 2006-10-16 2012-07-31 Marvell International Ltd. Power save mechanisms for dynamic ad-hoc networks
US20080129559A1 (en) * 2006-10-20 2008-06-05 Samsung Electronics Co.; Ltd H.264 decoder equipped with multiple operation units and method for decoding compressed image data thereof
US20080225950A1 (en) * 2007-03-13 2008-09-18 Sony Corporation Scalable architecture for video codecs
US20090034443A1 (en) 2007-07-30 2009-02-05 Jesse Walker Power saving idle mode algorithm for an access point
US20090034615A1 (en) 2007-07-31 2009-02-05 Kabushiki Kaisha Toshiba Decoding device and decoding method
EP2056628A1 (en) 2007-10-30 2009-05-06 Nokia Siemens Networks Oy Communication network element and method of switching activity states
WO2009077893A1 (en) 2007-12-17 2009-06-25 Nxp B.V. Method for generation of beacons by a base station in a wireless communications network
US20100002614A1 (en) * 2008-07-02 2010-01-07 Qualcomm Incorporated Low power modes for femto cells
US20100008277A1 (en) * 2008-07-11 2010-01-14 Milind Kopikare Partial power save mode for access points during device discovery
US20140022973A1 (en) * 2008-07-11 2014-01-23 Marvell World Trade Ltd. Power save mode for access points
US20100124931A1 (en) * 2008-11-05 2010-05-20 Suat Eskicioglu Location-based, event triggered inter-radio access technology handovers from a cdma macrocell to a wcdma femtocell
US20110244792A1 (en) * 2008-12-15 2011-10-06 Gi Won Park Method for saving power of a femto base station using sleep period synchronization

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
IEEE 802.11-2007 Standard for information Technology; Telecommunications and information exchange between systems-Local and metropolitan area networks-Specific requirements, pp. 1-1183; Nov. 1999.
Search Rept: Jul. 10, 2010.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9930617B1 (en) 2017-03-17 2018-03-27 At&T Intellectual Property I, L.P. State change enabled by a hierarchical class of a radio access network device
US10182397B2 (en) 2017-03-17 2019-01-15 At&T Intellectual Property I, L.P. State change enabled by a hierarchical class of a radio access network device
US10375631B2 (en) 2017-03-17 2019-08-06 At&T Intellectual Property I, L.P. State change enabled by a hierarchical class of a radio access network device

Also Published As

Publication number Publication date
KR101670534B1 (en) 2016-10-28
EP2441297B1 (en) 2018-12-12
KR20120031172A (en) 2012-03-30
AU2010257534B2 (en) 2014-10-30
ES2715283T3 (en) 2019-06-03
CN102804864B (en) 2016-01-06
CN102804864A (en) 2012-11-28
JP5506923B2 (en) 2014-05-28
EP2441297A1 (en) 2012-04-18
WO2010142681A1 (en) 2010-12-16
US20120093053A1 (en) 2012-04-19
PL2441297T3 (en) 2019-05-31
AU2010257534A1 (en) 2011-12-15
BRPI1011686A2 (en) 2016-03-22
JP2012529821A (en) 2012-11-22

Similar Documents

Publication Publication Date Title
US9088949B2 (en) Power saving method at an access point
CN110677903B (en) Dormancy control method, apparatus, medium and system for wireless access device, and wireless access device
US8306581B2 (en) Sleep optimization for mobile devices in a wireless network
CN113796039B (en) Determine PDCCH monitoring during on-duration in power saving mode
CN100466571C (en) Handle broadcast and multicast traffic as unicast traffic in wireless networks
US9332498B2 (en) Energy efficient base station entering sleep mode
US8161302B2 (en) Method and apparatus for data transmission in wireless local access network and system therefor
CN1809007B (en) Device and method for delivery of traffic indication message (dtim) periods in a wireless network
US8271010B2 (en) Wireless communication terminal and management device in a wireless communication system and method thereof
US8184568B2 (en) Wireless LAN system and wireless communication method
US20070238437A1 (en) Delayed host wakeup for wireless communications device
US20170201940A1 (en) Dynamic delivery traffic indication message implementations
US20140098727A1 (en) Methods and apparatus for network signaling during low-power operation
JP2018520540A (en) Techniques for performing intra-frame operations based at least in part on an identifier in a wireless local area network physical layer header
US20110183648A1 (en) Wireless base station device and power control method therefor
US10681638B2 (en) Communication system and IoT system
TW201547306A (en) Power management of communication devices
US9961640B2 (en) Communication system and IoT system
KR101986099B1 (en) Method and Apparatus for Filtering for Reducing Wake-UP Frequency
EP2282588A1 (en) A power saving method at an access point
KR101979671B1 (en) Method And Apparatus for Minimizing Beacon Signal Processing by Using Beacon Element
EP3367732A1 (en) Communication system and iot system
JP2011130157A (en) Radio communication base station
KR20090047597A (en) Apparatus and method for power saving mode support in broadband wireless access communication system

Legal Events

Date Code Title Description
AS Assignment

Owner name: THOMSON LICENSING, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:VAN OOST, KOEN;DUMET, SYLVAIN;BULTEEL, SABINE;AND OTHERS;SIGNING DATES FROM 20111121 TO 20111130;REEL/FRAME:032870/0276

STCF Information on status: patent grant

Free format text: PATENTED CASE

AS Assignment

Owner name: INTERDIGITAL CE PATENT HOLDINGS, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:THOMSON LICENSING;REEL/FRAME:047332/0511

Effective date: 20180730

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 8

AS Assignment

Owner name: INTERDIGITAL CE PATENT HOLDINGS, SAS, FRANCE

Free format text: CORRECTIVE ASSIGNMENT TO CORRECT THE RECEIVING PARTY NAME FROM INTERDIGITAL CE PATENT HOLDINGS TO INTERDIGITAL CE PATENT HOLDINGS, SAS. PREVIOUSLY RECORDED AT REEL: 47332 FRAME: 511. ASSIGNOR(S) HEREBY CONFIRMS THE ASSIGNMENT;ASSIGNOR:THOMSON LICENSING;REEL/FRAME:066703/0509

Effective date: 20180730